Posting a Resource with Circular References breaks when Application also includes ActiveSupport

[dlitvakb]

When your app requires ActiveSupport and you have a resource with circular references.

As ActiveSupport patches HTTP::Client to call ActiveSupport#to_json on #post and #put.

This causes a never-ending loop that will halt any other operations. This affects specifically Entry#save in the case of circular references.

Fix required is very simple:

module Contentful
  module Management
    class Entry
      alias_method :to_json, :fields_for_query
    end
  end
end